Four experiments investigated 4-, 6-, and 9-month-old infants' ability to perceive whether the width relationship between a block and the opening of a box specified passing through or support. Found that six- and nine-month olds looked significantly longer than four-month olds when a block wider than a box opening passed through this opening. (MDM)

Examined the contribution of specific contextual attributes to six-month-old infants' recognition of a well-learned cue. Infants did not encode contextual information in a holistic manner. The perceptual identification of contextual cues that were represented in the memory of an event was requisite for the retrieval of the memory. (GLR)

This study compared role of motion in adults' and infants' perception of object unity. Findings favored ecologically-oriented accounts of object perception. Motion was a determinant of object unity for infants. Alignment and common motion contributed to adults' object-unity perception; synchronous color changes did not. Infants detected…

Four experiments examined the perceptual features used by 4.5- to 11.5-month olds to individuate objects involved in occlusion events. Results indicated that 4.5-month olds used shape and size features to individuate objects in occlusion events. By 7.5 months, infants used pattern, and by 11.5 months, they used color to reason about object…

Four experiments investigated how readily infants achieve perceptual organization by lightness and form similarity. Infants were (a) familiarized with elements that could be organized into rows or columns on the basis of lightness or form similarity and tested with vertical versus horizontal bars depicting the familiar versus novel organization or…

Research supported by U.S. Public Health Service Grant MH-6415.

This paper deals with research on the development of infants' ability to perceive invariant features of things and the relation of objects to both the spatial layout of the infants' environment and to themselves. Basic assumptions regarding the perception of invariance are discussed and a theoretical view of the role of motion in the development…

Results showed that 2- and 3-dimensional forms affected 4- and 8-week-old infant visual behavior differently. (Author/JMB)

Two studies: (1) assessed the infant's ability to perceive differences between two-dimensional and three-dimensional stimuli; and (2) tested the infants' ability to transfer responses across dimensions. (Author/SB)

Examined length of fixation time responses of neonates to pairs of red, blue, and green acetate stimuli. (Author)

Reviews Greenough, Black, and Wallace's (1987) conceptual framework for understanding the effects of early experience and sensitive periods on development, and illustrates the applicability of their model with recent data on the consequences for animals and human infants of the acquistion of self-produced locomotion. (BN)

Reports on four experiments on pattern perception in four-month-old infants. The first experiment examined preference for patterns varying in structure; the second examined encoding patterns from different subset sizes; and the last two experiments examined changes in the size, position, and orientation of the habituation pattern. (HOD)

To demonstrate a relationship between rate of habituation and complexity levels, 11-week-old infants (N=51) were each given a rate-of-habituation and complexity-level test. Rapid habituators looked longer at complex patterns. Irregular habituators responded randomly to tests or resembled slow habituators in terms of complexity preferred. (ST)

Reviews pertinent developmental and neuropsychological literature and arrives at a hypothesis relating the left brain lateralization of speech to the origin of early naming as part of selective (right-biased) orienting to perceived salience or change. (Author/SS)